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We can separate a MIXTURE of TWO miscible liquid by the process of distillation.

Distillation is a process in which any mixture especially liquid can be separated on basis of THIER BOILING point.

Acidic salt-
Salt in which displaceable H+ ion are PRESENT
EG- N4So4

Basic salt-
Salt which displaceable OH- are present
Eg- Mg (oh) cl.

Neutral salt-
Salt in which displaceable H+ nd OH- ions are not present
Eg- Nacl, kcl

Plz MAKE me brain LIST

The CORRECT ANSWER is "C" , SOLUTION,COLLOID,suspension

A NATURAL source of NITROGEN oxidesoccurs from a lightning STROKE. The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to REACT to form nitric oxide. ... Both of these SOURCES contribute about equally to theformation of nitrogen oxides.

hope u may like it

The GENERAL term “hydrogenation” refers to the “REACTION of HYDROGEN with an organic compound.” ... The process used to modify oils is technically known as“catalytic hydrogenation,” since it takes place in the PRESENCE of a catalyst, which helps speed up the reaction.

Polar covalent bond is a bond in which the ATOMS are PARTIALLY POSITION and partially NEGATIVE. NON polar covalent bond are not so....

HOPES it helps
1. Oxygen
2. Hydrogen
3. NITROGEN
4. Helium
5.argon

6.02×10^20 /6.02×10^23= no. of moles present in 100 ML solution=10^-3. 1 molar concentration means 1 mole of SOLUTE in 1 litre solution . hence in100 ml if 10^-3 moles are present then in 1litre solution 10^-2 moles are present so concentration of urea in solution is 0.01 M .

Calculation:

E = hν

h = Planck’s constant = 6.626 x 10(-34) J s

ν = frequency

λ = Wavelength = 400 nm

C = Speed of LIGHT = 3 x 10(8) m/s

ν = C / λ

Substitute in the EQUATION,

E = 6.626 x 10(-34) J s x 3 x 10(8) m/s / 400 x 10(-9) m

E = 5 x 10(-19) J

When λ = Wavelength = 800 nm

E = 6.626 x 10(-34) J s x 3 x 10(8) m/s / 800 x 10(-9) m

E = 2.5 x 10(-19) J

Comparison:

Since wavelength is inversely proportional to energy, the radiation with 400 nm has higher energy than the radiation with 800 nm.

Than O2 will be 1/2 MOLE

Yes, (true) Common salt in water is a homogeneous mixture.

Liquid mixture like petroleum is an example of homogeneous mixture.In solid phase alloys like brass, BRONZE, alnico, duralumin can be considered ashomogeneous mixture examples.

The smallest identifiable unit of a compound is a(N) molecule,which is made up of atomSL which are chemically bonded.In a mixture, the substances (lose/retain) their IDENTITIES. 6. In a mixture the substances involved ((can/cannot) be SEPARATED by a simple physical process."

The olfactory INDICATORS are those which tell that substance is ACIDIC or basic by CHANGE in colour.
two olfactory indicators are phenolphthalein and METHYL orange

Electrolysis is used during refining of crude metals. ... Ans: In ELECTROLYTIC refining, a strip of impure metal is used as the anode, a PURE metal strip as the CATHODE and a solution of the metal as the electrolyte. The IMPURITIES gather at the anode and the pure metal at the cathode.

The REACTION is CALLED ENDOTHERMIC reaction on which HEAT absorbed.
N2+O2—— 2NO

Uses of Stable Isotopes
Scientists performing environmental and ecological experiments use stable isotopes of oxygen, hydrogen, sulfur, nitrogen and carbon. For example, in geochemistry, scientists study the chemical composition of geological materials such as minerals and rocks. Stable isotopes are dependable tools for determining many facts about geological materials, such as their age and where they CAME from.









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Home » Chemistry
Types of Isotopes & Their Uses
By Steve Johnson; Updated April 16, 2018
Types of Isotopes & Their Uses
Isotopes are alternative “versions” of elements that have a different atomic mass but the same atomic number. The atomic number of an element is simply the number of protons present in its atom, while atomic mass DEPENDS on how many neutrons it has. Isotopes of the same element have different quantities of neutrons, though the proton count is the same. Scientists divide isotopes into two main types: radioactive and stable. Both types see wide use in several industries and FIELDS of study.

TL;DR (Too Long; Didn't Read)
Stable isotopes help identify ancient rocks and minerals. Radioactive isotopes produce energy and serve in science, medicine and industry.



Stable Isotopes
Stable isotopes have a stable proton-neutron combination and do not display any sign of decay. This stability comes from the amount of neutrons present in an atom. If an atom has too many or too few neutrons, it is unstable and tends to disintegrate. Since stable isotopes do not decay, they do not produce radiation or its associated health risks.

Uses of Stable Isotopes
Scientists performing environmental and ecological experiments use stable isotopes of oxygen, hydrogen, sulfur, nitrogen and carbon. For example, in geochemistry, scientists study the chemical composition of geological materials such as minerals and rocks. Stable isotopes are dependable tools for determining many facts about geological materials, such as their age and where they came from.


Radioactive Isotopes
Radioactive isotopes have an unstable combination of protons and neutrons. These isotopes decay, emitting radiation that includes alpha, beta and gamma rays. Scientists classify radioactive isotopes according to their creation process: long-lived, cosmogenic, anthropogenic and radiogenic.

Long-lived radioactive isotopes EMERGED during the creation of the solar system, while cosmogenic radioactive isotopes occur as a reaction of the atmosphere to cosmic rays emitted by stars. Anthropogenic isotopes come from human-made nuclear activities, such as weapons testing and nuclear fuel production, while radiogenic isotopes are the end result of radioactive decay.

Uses of Radioactive Isotopes
Radioactive isotopes find uses in agriculture, food industry, pest control, ARCHEOLOGY and medicine. Radiocarbon dating, which measures the age of carbon-bearing items, uses a radioactive isotope known as carbon-14. In medicine, gamma rays emitted by radioactive elements are used to detect tumors inside the human body. Food irradiation -- the process of exposing food to a controlled level of gamma rays -- kills many types of bacteria, making food safer to eat.



Hope it helps you ... mark as brainlist plz PlzZ

i am just GIVING a HINT :- LOG [ 1/H+]

[10∧7/6.2 X 10 ∧-9]

It KEEPS the FOOD WRAPPED in it HOT /WARM

Answer:

EXPLANATION:

carbyl amine, Hoffman DEGRADATION, COUPLING reaction

Hii There!!!

1)  1 mole of He contains 6.023x10^23
So, 52 moles of He contains 52 x 6.023 x10^23atoms

2) Atomic mass of HELIUM is 4u
= 2protons + 2 NEUTRONS = 1 atom 

So, The number of ATOMS in 52u = 52/4 = 13 atoms.


3) 4g of He has 1 mole 

=) 1g of He has 1/4 mole 

So, 52g of He has 1/4 x 52 = 13 moles 

Since, 1 mole=6.022x10^23atoms 

So, 13 moles 13x6.023x10^23 atoms.



Hope it helps☺️

(i) 1 mol of AR = 6.022×1023atoms
∴ 52 mol of Ar = 52×6.022×1023atoms = 3.131×1025atoms
(ii) 1 ATOM of He = 4 u of He
4 u of He = 1 Atom of He
∴ 52 u of He = 1/4 × 52 = 13 atoms
(iii) 1 mol of He = 4 g = 6.022×1023atoms
∴ 52 g of He = (6.022×1023/4) × 52 atoms = 7.8286×1024atoms

The SN2 reaction is a type of reaction MECHANISM that is common in organic chemistry. In this mechanism, ONE bond is broken and one bond is formed synchronously, i.e., in one step. SN2 is a kind of NUCLEOPHILIC SUBSTITUTIONREACTION mechanism. ... Many other more specialized mechanisms describe substitution reactions.

When chlorine is passed from slaked limeSlaked LIME reacts withchlorine gas to produce the bleaching agent CALCIUM hypochlorite – a common form of 'swimming pool'chlorine


HOPE U gottt

MOLAR mass of LI=6

70 MG of li= 70*1/1000=0.7g

therefore

0.7*1/6=0.1

Li+= 520 KJ/mol

li= 0.1* 520=5.2 kj

answer

By the object called separating FUNNEL it is used to SEPARATE TWO emulsions .
HOPE it ill HELP you.

carbon CONTAINS 6 electrons.

O2 CONTAIN 8+8=16 electrons.

total

= 16+6

=22 ELECTRON

The ELEMENT which INCREASES or DECREASES the VELOCITY of the REACTION.

➡️Aluminium is more reactive than gold.

➡️Aluminium is not a stable element HENCE when reacts with other elements, BECOMES stable where as gold without reacting with others is stable.

➡️Hecne, Gold is found in FREE State and aluminium is not.

Hope it will help...!!!

Hey friend...✋✋

here's your answer ⬇⬇

==>This is because gas MOLECULES are free to move DUE to less attractive forces between the PARTICLES . Therefore , a gas fills COMPLETELY the vessel in which it is kept.

hope it helps u ^_^

Actinides, having smaller IONS than that LANTHANIDES have,

that ions being higher in charge, Actinides are more tendent to

form COMPLEXES than lanthanides.

These actinides can form more complexes with ORGANIC compounds.

Actinides are GROUP of radioactive metallic elements.

Lanthenides cannot form complexes since they have ions with

lower charge and low nuclear density .

When new bonds are MADE between the IONS and WATER MOLECULES

IT FORMS a SALT, carbon dioxide and water.
I HOPE it HELPS you.
Please make me brainliest.

##PH = >STANDS for POTENTIAL of hydrogen
It is a measure of acidity and ALKALINITY of water SOLUBLE substances.
There are 14 number on PH scale .
Below 7, all are acids.
At 7, it is neutral.
Above 7 ,all are bases.

Here... AL is in +3 state.......

PLZZ... MARK me BRAINLIEST...

The vast majority of crystals in CHEMISTRY consist of discrete molecules held TOGETHER by weaker intermolecular FORCES(SOMETIMES called van Der Waals bonds). These are fairly weak compared to covalent bonds and result in crystals that are weakand have low melting points.

Answer:

I am writing question

Explanation:

What do you observe when

(a) LEAD nitrate is heated.

(b) Silver chloride is exposed to sunlight.

(c) HYDROGEN peroxide is exposed to sunlight.

(d) H2S gas is passed through copper sulphate solution.

(E) Barium chloride is ADDED to sodium sulphate solution.

(F) Water is added to quicklime.

(g) Sodium chloride solution is added to silver nitrate

solution.

. no. of molecules is PRESENT in- (1) 15L of H2 GAS at STP ​(2) 5L of N2 gas at STP ​(3) 0.5 G of… ... (4) 10 g of O2 gas ... no. of molecules =moles×Na(avogadro no.).

I think your question is WRONG correct question is

an organic compound containing c and h gave the FOLLOWING analysis c=40% H=6.7% and remaining is O . it's empirical formula would be?

so % of O(oxygen) = 100-(40+6.7) = 100-46.7 = 53.3 % .

Emperical formula :- It REPRESENT the simplest whole number ratio of atoms of the all the ELEMENTS by number of moles.

molecular formula :- It represent the ACTUAL ratio of atoms of the all the elements by number of moles.

⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩
⏫Emperical formula :- CH2O.⏬
⏪⏪⏪⏪⏪⏪⏪⏪⏪⏪⏪⏪

It is SOLUTION OFNA and CL

Answer:

EXPLANATION:

CaCO3------>CaO+CO2, HOPE you understood.

GIVEN BOTH HAVE SAME OP

THEN C1 = C2

15/60 = X/ 180

x = 45 GMS.